Problem 11 · 2015 Math Kangaroo
Medium
Spatial & Visual Reasoning
dice-faces
In the diagram one can see my decision-die in three different positions. What is the probability I get a “YES”, when rolling this die once?
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Answer: B — \(\frac{1}{2}\)
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Hint 1 of 2
Figure out the full set of six faces from the three views, then count how many say YES.
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Hint 2 of 2
The die has 3 faces YES, 2 no, 1 maybe; the probability is the YES fraction.
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Approach: identify all six faces, then take the fraction
- The three views together reveal the die's faces: three say YES, two say no, one says maybe.
- Probability of YES = 3 out of 6 = 1/2.
Mark:
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